Compact connections for interdispersed armature winding

Abstract

An improved alternating current machine having interdispersed armature windings is disclosed. The AC machine comprises an armature core having a plurality of generally longitudinal slots and a plurality of winding groups. Each of the winding groups comprises a plurality of one-turn coil windings which are series connected to electrically adjacent windings of the winding group. Each winding has two generally parallel side portions disposed in non-adjacent ones of the slots. The side portions are joined at one end by an end turn which extends axially outward from one end of the armature core and each of the side portions have an end connection extending a distance axially outward from the other end of the armature core for connecting to a respective electrically adjacent end connection of its electrically adjacent winding. The winding groups are interdispersed about the armature core such that there are a plurality of fixed distances between the electrically adjacent windings. The end connections extend outwardly from the armature core a plurality of distances, and the distance which each particular one of the end connections extends is proportional to the distance between the particular end connection and its electrically adjacent end connection to which it is series connected.

We claim: 
     
       1. In an alternating current machine comprising an armature core having a plurality of generally longitudinal slots and a plurality of winding groups, each winding group comprising a plurality of one-turn wave windings which are series connected, each winding in each winding group having two generally parallel side portions disposed in non-adjacent slots, said side portions joined at one end by an end turn extending axially outward from one end of said armature core and each of said side portions of each of said windings having an end connection extending a distance axially outward from the other end of said armature core for connecting to a respective end connection of a winding to which each of said winding is series connected, wherein said winding groups are interdispersed about said armature core such that there are a plurality of fixed distances between said windings, the improvement wherein said end connections of each of said winding extend outwardly from said armature core a plurality of distances, and the distance which each of said end connections extends is proportional to the distance between the end connection of each of said windings and the end connection of said winding to which each of said winding is series connected.   
     
     
       2. In a three phase alternating current machine comprising an armature core having a plurality of generally longitudinal slots and at least six winding groups, at least two of said winding groups associated with a respective one of each of said phases to form respective north and south magnetic poles, each winding group comprising a plurality of one-turn windings which are series connected, each of said windings in each of said winding groups having two generally parallel side portions disposed in non-adjacent slots, said side portions joined at one end by an end turn extending axially outward from one end of said armature core and each of said side portions of each of said windings having an end connection extending a distance axially outward from the other end of said armature core for connecting to a respective end connection of an adjacent winding so that said plurality of one-turn windings are series connected, wherein said winding groups are interdispersed. about said armature core such that there are a plurality of fixed distances between said windings, the improvement wherein said end connections of each of said windings extend outwardly from said armature core one of two predetermined distances, and the distance which each of said end connections extends is proportional to the distance between the end connection of each one of said windings and the end connection of said adjacent winding to which each one of said windings is connected to effect a series connection.   
     
     
       3. In a single phase alternating current machine comprising an armature core having a plurality of generally longitudinal slots and an even plurality of winding groups, said winding groups forming respective north and south magnetic poles and each of said winding groups comprising a plurality of one-turn windings which are series connected, each of said windings having two generally parallel side portions disposed in non-adjacent slots, said side portions joined at one end by an end turn extending axially outward from one end of said stator core and each of said side portions of each of said windings having an end connection extending a distance axially outward from the other end of said armature core for connecting to a respective end connection of an adjacent winding to effect a series connection between said plurality of one-turn windings, wherein said winding groups are interdispersed about said armature core such that there are a plurality of fixed distances between said windings, the improvement wherein said end connections of each of said windings extend outwardly from said armature core one of two predetermined distances, and the distance which each of said end connections extends is proportional to the distance between the end connection of each one of said windings and said end connection of said adjacent winding to which each one of said windings is connected to effect a series connection.   
     
     
       4. A one-turn coil for an alternating current machine having an armature core having a plurality of generally longitudinal armature slots and a plurality of winding groups, each winding group comprising a plurality of one-turn wave windings which are series connected, each winding in each of said winding groups having first and second generally parallel side portions disposed in non-adjacent slots, said side portions of each of said windings joined at one end by an end turn extending axially outward from one end of said armature core and having respective first and second end connections each extending a distance axially outward from the other end of said armature core for connecting to a respective end connection of an adjacent winding so that said plurality of windings are series connected, wherein said winding groups are interdispersed about said core such that there are a plurality of fixed distances between said windings, wherein: said first end connection of each of said windings is a first length as determined by the distance between the slot of said first end connection and the slot of an end connection of said adjacent winding to which said first end connection is series connected; and   said second end connection of each of said windings is a second length as determined by the distance between the slot of said second end connection and the slot of an end connection of said adjacent winding to which said second end connection is series connected.   
     
     
       5. The winding of claim 4 wherein said length of said first and second end connections of each of said windings are proportional to the distance between said first end connection and the end connection of said adjacent winding to which said first end connection is series connected, and between said second end connection and the end connection of said adjacent winding to which said second end connection is series connected.